#include <stdio.h>

int main()
{
   char ch1='a';
   char ch2='3';
   char ch3=20;
   printf("ch1=%c,ch2=%c,ch3=%c：\n",ch1,ch2,ch3);
   printf("ch1=%d,ch2=%d,ch3=%d：\n",ch1,ch2,ch3);
   return 0;
}